LAB GRUPPEN D 20:4L_US1 2000W Amplifier with 4 Flexible Output-Channels, Lake Digital Signal Processing and Digital Audio Networking for Installation Applications (D 20:4L_US1)

Vendor: Lab Gruppen
LAB GRUPPEN D 20:4L_US1 2000W Amplifier with 4 Flexible Output-Channels, Lake Digital Signal Processing and Digital Audio Networking for Installation Applications (D 20:4L_US1) The D 20:4L harmonizes 2000 watts of adaptable power with...

LAB GRUPPEN D 20:4L_US1 2000W Amplifier with 4 Flexible Output-Channels, Lake Digital Signal Processing and Digital Audio Networking for Installation Applications (D 20:4L_US1)

The D 20:4L harmonizes 2000 watts of adaptable power with cutting-edge LAKE DSP, DANTE digital audio networking, and advanced system integrity monitoring.

The D 20:4L inherits its robust, high-power amplifier technologies from our acclaimed PLM Series—an amplifier platform celebrated for its reliability and audio performance in demanding scenarios, including global concert tours and high-profile installations. Tailored for digitally networked sound applications in large commercial settings like stadiums, arenas, and performance venues, the D 20:4L integrates LAB GRUPPEN's renowned reliability and sound quality with updated output stage technologies. These advancements, coupled with installation-specific hardware and software features, streamline amplifier system design, curbing initial equipment expenses, and minimizing long-term energy consumption for end users.

Rational Power Management (RPM)

The D Series is anchored by Rational Power Management (RPM), LAB GRUPPEN's exclusive technology empowering system designers and integrators with unparalleled freedom in distributing output power across each channel for optimal performance under specific load conditions. RPM not only enables cost reduction but also mitigates the need to over-specify amplifiers typically seen in conventional installations. This alleviates the common issue of excessive power on some channels while others remain underutilized. For instance, the D 120:4T/Ta can harness up to 5000 W of power output on two channels, allowing for smarter allocation of available power to accommodate less demanding loads across the remaining channels.

CAFE for Green Credentials

The D 20:4L offers configurability and monitoring through the innovative CAFE (Configuring Amplifiers For the Environment) software suite. This powerful tool not only facilitates comprehensive system surveillance and RPM configuration but also features the Equipment Specification Predictor (ESP). ESP analyzes system requirements, suggesting optimal specifications for the D Series units including model and quantity needed, heat generation, channel distribution, and current draw. This thorough analysis results in precise mains management and accurate specific.

The Power of LAKE Processing

The D Series LAKE amplifiers offer unparalleled input flexibility, leveraging exclusive LAKE processing algorithms for powerful performance. These models boast comprehensive control and load monitoring via the LAKE Controller and seamless integration into Dante digital audio networks. Additionally, through third-party middleware, they can integrate into other widely used networked digital matrix systems. Each D Series LAKE model incorporates four full-featured LAKE Processing modules, delivering four discrete channels of audio throughput input to output. This includes selectable audio signals from analog and digital channels, ensuring adaptability to various setups. The onboard LAKE processor provides advanced group control with Raised Cosine™ MESA EQ™ asymmetric filters, catering to diverse loudspeaker systems. Furthermore, the LimiterMax™ peak and RMS limiters set a benchmark for loudspeaker protection and sonic transparency.


  • 2,000 Watt amplifier with 4 flexible output channels and up to 1,600 Watts channel output

  • Lake digital signal processing for unparalleled loudspeaker management and system control

  • Integrated 8x8 channels of dual redundant Dante digital audio networking with AES67 support

  • 4 x 500 Watts into 2 Ohms, 4 x 500 Watts into 2.67 Ohms, 4 x 500 Watts into 4 Ohms, 4 x 500 Watts into 8 Ohms, 4 x 425 Watts into 16 Ohms, 4 x 500 Watts into Hi-Z 25 V, 4 x 500 Watts into Hi-Z 70 V, 4 x 250 Watts into Hi-Z 100 V

  • Proven and reliable IDEEA Class D Output Stage with direct drive 70 and 100 V constant voltage systems as well as low impedance

  • Rational Power Management (RPM) provides total flexibility to allocate available power across all 4 output channels for the most efficient use of system inventory

  • Best-in-class Power Factor Correction (PFC) and switch mode power supply reduces running costs and minimizes environmental impact

  • Breaker Emulation Limiter (BEL) with configurable mains current draw threshold and breaker profile to safeguard mains breakers from tripping

  • Configurable Auto Power Down and Adaptive Rail Control enable real world lifetime energy savings

  • Under-voltage limiting (UVL) for continued operation during severe mains supply voltage drops

  • Dedicated on-board surveillance and load monitoring for mass notification applications

  • Redundant audio inputs and on-board system surveillance for voice alarm systems

  • CAFE (Configuring Amplifiers For the Environment) software for design, system planning, equipment planning, installation and commissioning

  • Control and monitoring integration with 3rd-party matrix systems including MediaMatrix and Q-Sys via dedicated interfacing software

  • Dedicated front-panel mute buttons for each amplifier channel with bicolor LED indication

  • 4 "Lake Class" analog input channels with Iso-Float ground isolation for reliable audio distribution

  • 4 input channels of AES/EBU (AES3) digital audio supporting all standard sample rates up to 192 kHz with 24-bit resolution

  • 2 Neutrik etherCON RJ-45 ports provide dual redundant Dante interfaces and remote configuration via Lake Controller and Dante Controller software

  • Balanced analog and digital audio inputs and amplifier outputs on plug-in Phoenix connectors

  • Detachable and locking IEC mains cable rated at 250 V / 16 A with a variety of wall plugs selectable on order

  • Removable dust filter grille for increased air circulation and simple maintenance

  • Rugged slimline (1U) rackmount chassis including rear support brackets for ease of installation

  • Designed and engineered in Sweden

Processing / Network

Lake / Dante

Number of amplifier channels


Total burst power all channels (share among channels with RPM)

2000 W

Max output power (all channels driven)1
2 ohms

500 W

2.67 ohms

500 W

4 ohms

500 W

8 ohms

500 W

16 ohms

425 W

Hi-Z 25 V

500 W

Hi-Z 70 V

500 W

Hi-Z 100 V

250 W

Max output power single channel (all models)1
2 ohms

850 W

2.67 ohms

1150 W

4 ohms

1600 W

8 ohms

1100 W

16 ohms

600 W

Hi-Z 25 V

500 W

Hi-Z 70 V

1400 W

Hi-Z 100 V

1000 W

Amplifier output modules (all models, all channels)
Peak output voltage

142 Vpk

Max output Current

30 Apk

Rational Power Management (RPM)

Share “Total burst power” of the product freely among channels. Any channel can scale up to the “single channel max power”

Default voltage limitation (can be lifted with RPM configuration)

100 Vpk

Protection features

Current Average Limiter (CAL), Very High Frequency Protection (VHF), Direct Current Protection (DC), Short Circuit Protection, Current-Clip Limiter, Voltage Clip Limiter, Temperature protection

Amplifier platform
Inter Sample Voltage Peak Limiter (ISVPL)

Configurable Peak voltage threshold and profile

Amplifier gain

Digital configurable amplifier gain 22 - 44 dB

Dynamic range

> 112 dB

Load impedance analysis


Temperature control

Temperature regulated fans (front-to-rear airflow) and show must go on limitation (ATL, PTL)

Internal Sample Rate / Data path

96 kHz / 32 bit floating point

Product propagation delay AES 96 kHz / analog input

1.61 / 1.68 ms

Lake processing
Loudspeaker processing

Up to 4 modules of Classic/linear-phase/FIR crossover, EQ, delay, LimiterMax™ - peak and RMS limiters

System tuning

Group control with Raised Cosine™ MESA EG™ asymmetric filters

Input redundancy / Matrix

Automatic 4 level input redundancy / 4 input mixers

System integration

Comprehensive 3rd party protocol over UDP Ethernet

Dante Audio Network
Dante I/O

8 x 8

Network topology / redundancy

Flexible topology / Supports daisy-chained and Dual redundant networks

Sample Rates / Transport

48, 96 kHz / Uni + Multicast

Network latency

0.25, 0.5, 1.0, 2.0, 5.0 ms

AES Inputs

4 AES inputs

Supported sample rates / resolution

44.1, 48, 88.2, 96, 176.4, 192 kHz / up to 24 bits

Sample rate conversion THD+N 20 Hz - 20 kHz unweighted


Analog Inputs

4 high quality inputs with Iso-Float ground isolation

Maximum input / digital reference

+26 dBu / +21 dBu

Sampling rate / Resolution

96 kHz / 24 bit

Input impedance balanced / unbalanced

20 / 10 kOhm

THD+N (typical at 1 kHz unweighted)


THD+N (typical at 20 Hz and 20 kHz unweighted)


Back panel Interface
Analog inputs

4 x Terminal block connectors analog input with +, - and ground

AES inputs

4 x Terminal block connectors analog input with +, - and ground

Output connectors

4 x 2 pole Terminal block connectors rated at 1000 V / 41 A (exceeding amplifier capacity) Can take up to 8 mm2 (8.2 AWG) cables

Ethernet Ports

2 x EtherCon RJ45 Lake Controller, Dante controller and/or DLM (3rd party protocol)

Detachable mains cord

Detachable locking 3-pin IEC rated at 250 V / 16 A

Front-panel user interface
System status indication

3 x tri-color LED. FRAME, TEMP, PSU for device status indication

Channel status indication

3 x tri-color LED per channel. Status indication separated for channel LOAD, AMP, SIGNAL status


Per channel touch button for MUTE control and tri-color LED for indication


Touch button for ON/STANDBY control and tri-color LED for power state indication


Touch button and LED for bidirectional device software select functionality

Mains Power
Nominal voltage

100 - 240 Volt AC 50 - 60 Hz

Operating voltage

70 - 265 V AC 45 - 66 Hz

Mains wall plug

Selectable on order CEE 7/7 “Schuko” 230 V / 16 A, NEMA 5-15 125 V / 15 A, BS1363-A 250 V / 13 A, IA16A3 250 V / 16 A, AU/NZ 250 V / 10 A, JP 125 V / 15 A, CPCS-CCC 250 V / 10 A

Power supply features
Soft start / Inrush power


Power factor correction

> 0.98 for mains power > 300 W

Regulated switch mode power supply (R.SMPS)


Breaker Emulation Limiter (BEL)


BEL max current threshold

Fixed 8 A

Power Average Limiter (PAL)


Under Voltage Limiter (UVL)


Mains undervoltage and overvoltage protection and mains glitch tolerance


Rack rail to rear panel

W: 483 mm (19”), H: 44 mm (1 U), D: 425 mm (16.7”)

Overall depth front-rear support

D: 463 mm


7.9 kg (17.3 lbs)


Black painted steel chassis with grey painted steel front with detachable grille